Arrangement for driving auxiliary parts or apparatus on board aircraft



D 2 G. GARNIER ARRANGEMENT FOR DRIVING AUXILIARY P RTS 0R APPARATUS ONBOARD AIRCRAFT Original Filed Aug. 9, 1945 5 Sheets-Sheet l Dec. 23,1952 G. GARNIER ARRANGEMENT FOR DRIVING AUXILIARY PARTS OR 5Sheets-Sheet 2 Pm 7! 17 7, I ,2

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Ire/v elvfivz Dec. 23, 1952 5. GARNIER 2,622,453

ARRANGEMENT FOR DRIVING AUXILIARY PARTS OR APPARATUS ON BOARD AIRCRAFTOriginal Filed Aug. 9, 1945 5 Sheets-Sheet 5 Dec. 23, 1952 G. GARNIER2,622,453 ARRANGEMENT FOR DRIVING AUXILIARY PARTS OR APPARATUS ON BOARDAIRCRAFT Original Filed Aug. 9, 1945 5 Sheets-Sheet 4 Dec. 23, 1952 aGARNIER I 2,622,453

ARRANGEMENT FOR DRIVING AUXILIARY PARTS OR APPARATUS ON BOARD AIRCRAFT 5Sheets-Sheet 5 Original Filed Aug. 9. 1945 Patented Dec. 23, 1952ARRANGEMENT FOR DRIVING AUXILIARY PARTS OR APPARATUS ON BOARD AIR- CRAFTGeorges Garnier, Paris, France, assignor to Air- Equipement, Paris,France, a French company Original application August 9, 1945, Serial No.609,826. Divided and this application August 9, 1949, Serial No.109,397. In France September 7, 1942 Section 1, Public Law 690, August8, 1946 Patent expires September '7, 1962 '7 Claims.

The present invention, which is a division of the invention described inthe patent application Serial No. 609,826, filed August 9, 1945, relatesto the problem of the driving of auxiliary parts or apparatuses, forinstance on board of aircrafts. This driving is generally performedthrough the agency of gear-boxes provided with a Cardan shaft or thelike device, forming part or not forming part of the gear-box, forconnecting the latter with a motor and for allowing thus the gear-boxand the different auxiliary parts to be driven.

It is often of advantage to drive at a distance, through the gear-box,one or more auxiliary parts when it is undesirable to position thelatter on the gear-box for reasons of lubrication,vibration-transmission, bulkiness, or the like. It is also of advantageto give the gearbox different positions with reference to the axis ofthe motor driving it, because the available room differs from one typeof aircraft to another and it is of interest for the builder and for theuser, to solve the problem in all cases with the same standard gear box;it is also desirable to be capable of making use according to the numberof auxiliary parts to be driven, a more or less great number oftransmission means or of couplings while using a standard gear-box.

The invention has for its object to provide for gear box arrangementswhich may be used together or separately for ensuring the drive ofauxiliary parts on board of aircrafts with the maximum ease and facilityin the system, preferably through the transformation of a standardgear-box by means of interchangeable auxiliary parts adapted for usewith the said gearbox.

In an embodiment of the arrangement according to the invention, the gearbox which is driven at a distance from the motor driving it, comprises amain gear casing having gears therein and carrying at least oneauxiliary casing secured preferably in a removable manner thereto andprovided itself with at least one transmission means starting from it,provided through the surface of a joint and connected throughtransmission means with the mechanism of the main gear casing. It is ofparticular advantage for this auxiliary casing to be designed so as tocap, in place of one of the auxiliary parts, one of the transmissionmeans starting from the main gear box, preferably any of a number or ofall of said transmission means, the transmission means starting from theauxiliary casing being then adapted for coupling with the consideredtransmission means on the gear-box. It is thus pos-- sible to transformat will a standard gear-box so as to make it drive a number of auxiliaryparts different from the standard number. An advantageous generalisationof this arrangement consists in constituting a series of interchangeableauxiliary casings all adapted to fit on the standard gear box, each ofsaid casings being designed in a different manner or being provided withtransmission means the number of which is different or which arearranged differently.

Appended drawings show by Way of example several examples of embodimentof the gear-box arrangements intended to drive auxiliary parts on boardof aircrafts.

In said drawings:

Fig. l is a diagrammatical perspective outer view of a gear-box thedriving shaft of which may be mounted in different positions and Fig. 2shows a modification of said gear-box with two auxiliary parts intendedfor mounting on the said auxiliary gear box.

Fig. 3 is a diagrammatical perspective outer view of a gear-box carryingan auxiliary casing provided with a plurality of transmission meanswhile Fig. 4 shows diagrammatically its gear work.

Figs. 5 and 6 are views which are respectively similar to Figs. 3 and 4and show the same gearbox, but with the addition of a Cardan shaftadapted to be mounted in different positions and with two auxiliaryparts intended for mounting on the auxiliary gear box.

Figs. 7, 8 and 9 are axial cross-sections of different auxiliary casingsprovided with a plurality of transmission means.

Fig. 10 is an axial cross-section of an auxiliary casing provided withclutching means.

In the embodiment shown in Fig. l the main gear box is of a known typecomprising a casing tl containing gears and transmission shaft or meansarranged at from one to another.

These transmission means end under the form of inwardly fluted sleeves62, 43 opening through different faces of the box at the center ofbearing surfaces IEH, N12 to which are secured the auxiliary parts to bedriven.

In front of the main casing BI is mounted an auxiliary casing 55containing a knee-joint for coupling the gears of the main box ll with adriving shaft 2d and a stub-shaft provided with a fluted end-piece forconnecting said knee-joint with the transmission means of the gear-box.It is then possible to mount this shaft M. on any of the transmissionmeans of the casing 4|.

In the embodiment shown in Figs. 3 and 4 the main gear box Ma withbearing surfaces I03, I04, IE is provided with two transmission meanslocated side by side, 56a and 56b, driven respectively by the toothedwheels 51, 55, said toothed wheels mesh with a common pinion 59 keyed tothe spindle of the bevel pinion ite which is one of three bevel pinions65c, 46c, i'ie meshing with a common pinion 48c rigidly secured to theCardan joint Me for the driving shaft 26.

The modification shown in Fig. 2 in which are shown two auxiliary partsA and B intended for mounting on two bearing surfaces of the casing 4|ain order to be driven from the transmission means 56a and 56b, differsfrom that just described only through the arrangement of the drivingshaft 2d which is similar to that described with reference to Fig. 1.

It is possible to replace any transmission means through an auxiliarycasing 6| comprising in its turn a plurality of transmission means 62,63, 64 and 55 as illustrated in Figs. 3, 4, 5 and 6 in the case of agear box comprising several transmission means located side by side, butauxiliary casings such as casing 61 may also be provided on a standardcasing in lieu of as many simple transmission means. Such a casing 6| ispreferably interchangeable with the casing 55 of Fig. 2.

Figs. 5 and 6 (wherein the gear members already described with referenceto the Figs. 3 and 4 are indicated with the same reference numerals)show, on the one hand, two auxiliary parts C and D which may be mountedon the auxiliary gear box 6| and, on the other hand, the adjunction tothe system illustrated in Figs. 3 and 4 of a shaft 5Ie with a Cardanjoint 5i for driving an auxiliary part distant from the gear box. Saidshaft is carried by a small casing 65 removably secured to the casing Siin front of one of its transmission means 63 inside which is fitted afluted stubshaft integral with the Cardan joint 5|) in shaft 5Ie.

The casing 6| may form an integral part of the gear-box as shown in Fig.'7 where the spin dle 42g of the pinion 45g passes through the casing BIand ends under the form of a fluted part over which is fitted a bevelpinion 61 having width teeth and of which the long hollow spindle 68 ispartly tapped and projects outside the casing 6|. The bevel pinion 6!inside the casing 6| meshes with bevel pinions 69, 19, ll integralrespectively with corresponding fluted sleeves forming transmissionmeans at 62, 64 and 55 for spindles distributed at 90 with reference toone another in a common plane perpendicular to the spindle 429.

The outwardly projecting, fluted portion of the spindle 68 formstransmission means. In the example of Fig. '7, a sleeve 12 forms acup-shaped bearing for the knee-joint 13 of a shaft 14 and is fittedover said fluted part. It is held fast by means of a screw 15 screwedinto the tapped part of this spindle 68.

In Figs. 8 and 9, the auxiliary casing Si is designed in the same manneras in Fig. 7 with the difference that the driving shaft 42h for thedifferent transmission means of the casing is not longitudinally rigidwith the gear wheel which drives it and which forms part of theprincipal casing, but is provided with fiutings "it which engage thetransmission means on the standard casing which is to receive theauxiliary casing. The latter thus designed is therefore capable of beingimmediately fitted over said transmission means and eventually over anyone of a number of such transmission means on a standard casing, if someor all of the transmission means on the latter are identical with oneanother.

Whatever may be the design of the other parts of the auxiliary casing,its pinions are arranged as shown in Figs. 8 and 9 if it is desired to!provide for a casing comprising at least two transmission means at fromone another and driven through couples of gears; they are provided witha common driving pinion 67 carrying elongated teeth whereas the pinions69 and H (or 69, 69a and 'H) of the adjacent transmission means are ofdifferent diameters and carry short teeth meshing with differentportions of the elongated teeth of the common pinion 67.

In the embodiment of the auxiliary casing Gia shown in Fig. 10, thetransmission means 17 perpendicular to the driving shaft 422 isconnected with its driving pinion l3, meshing with a pinion !9 fittedover the shaft 522, through the agency of a friction clutch 8%controlled from outside through the handwheel 8|.

Of course the invention is by no means limited to the details ofexecution shown or described which have been given out solely by way ofexample.

What I claim is:

1. A gear-box arrangement comprising a casing including outer faces,bearing surfaces provided on several outer faces of said casing forreceiving cooperating surfaces of corresponding auxiliary parts to bedriven by said arrangement, two of said bearing surfaces being providedside by side on one of said casing faces, a driving shaft having on itstwo ends disconnectable coupling means that open on to two oppositebearing surfaces, a driving bevel pinion secured on said driving shaft,three bevel driven pinions in mesh with the driving pinion and havingtheir axes converging at right angles with respect to each other and tothe said driving shaft and including two opposite driven pinions, twocoaxial driven shafts whereon are secured said two opposite drivenpinions, said driven shafts having on their outer ends disconnectablecoupling means that open on to two opposite bearing surfaces, a toothedwheel forming one piece with the third driven pinion, two toothed wheelsin mesh with the first named toothed wheel, and two disconnectablecoupling means forming one piece with the last named toothed wheels andarranged so as to open on to the two bearing surfaces located side byside on the same casing face.

2. A gear box arrangement as defined in and by claim 1 and furtherincluding an auxiliary casing removably secured to another outer face ofsaid first mentioned casing, a driving bevel pinion within saidauxiliary casing, means operably coupling the same to one of said drivenshafts in said first casing, at least two driven bevel pinions withinsaid auxiliary casing in mesh with the driving bevel pinion therein andhaving their axes disposed at right angles with each other and with theaxis of the driving bevel pinion, said last mentioned pinion havingelongated teeth and said driven bevel pinions in the auxiliary casingbeing in mesh with said teeth on two different diameters thereof so thatthe driving and driven pinions in the auxiliary casing have the samespeed, and means for removably coupling said last mentioned drivenpinions with auxiliaries to be driven.

accaece 3. A compact arrangement for driving from a prime mover,auxiliary parts on board aircraft comprising the combination of a maingear box including a casing and fixed speed gears therein with anauxiliary gear box removably secured to said main gear box, the casingof said main gear box having bearin surfaces thereon for receivingcooperating bearing surfaces of some of said auxiliaries to be driven,disconnectab-le coupling elements identical to each other, with theiraxes at right angles with respect to each other for driving auxiliariesfrom the gears within the casing through corresponding bearing surfaces,said auxiliary gear box including a casing and means for removablysecuring the same to any one of the bearing surfaces of the main gearbox, said auxiliary gear box casing having fixed speed gears therein anddisconnectable coupling elements for driving some others of theauxiliary parts and coupling means for positively connecting the gearsof the auxiliary gear box to one of the coupling elements of the maingear box.

4. The combination as claimed in claim 3, wherein the gears of theauxiliary gear box comprise at least one driving bevel pinion drivenfrom one of the coupling elements of the gears of the main gear box andat least two driven bevel pinions in mesh with said driving pinion andhaving their axes at right angles with each other and with the axis ofthe driving pinion.

5'. A combination as claimed in claim 4, wherein the driving pinion haselongated teeth, the driven pinions being in mesh with said drivingpinion on two difierent diameters of said pinion so that the driving anddriven pinicns may run at equal speed.

6. The combination as claimed in claim 3, wherein the casing of theauxiliary gear box is provided with bearing surfaces for receivingcooperating surfaces of some auxiliary parts, the

GEORGES GARNIER.

CITED lhe following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 2,287,279 Stumpf l- June 23, 19422,289,396 Waseige July 14, 1942 2,454,293 Waseige Nov. 23, 1948 FOREIGNPATENTS Number Country Date 473,229 Great Britain Oct. 8, 1937

